Chair seat tilt control

Details Chair seat tilt control Chair seat tilt control

1989-06-30

1990-01-09

McCall, James T.

Chairs and seats

Back movement resiliently opposed in operating position

Back adjusts independent of seat

248575, 297302, 297304, A47C 300

Patent

active

048923540

ABSTRACT:
A seat support mechanism for a tiltable chair having a rear tilt torque mechanism including interconnected torsion bars which are adjustable to vary the resilient restraining force which opposes rearward tilt of the seat when occupied, a detent mechanism which provides additional detent and stability to maintain the seat in its normal upright position and add to the resistance of the torque mechanism, and an adjustment mechanism for adjusting said detent mechanism for front tilt.

REFERENCES:
patent: 4214726 (1980-07-01), Karrip
patent: 4438898 (1984-03-01), Knoblauch et al.
patent: 4570895 (1986-02-01), Whitwan
patent: 4685733 (1987-08-01), Machate et al.
patent: 4720142 (1988-01-01), Holdredge et al.
patent: 4744600 (1988-05-01), Inoue

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